third_party/WebKit/Source/core/paint/FramePainter.cpp

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "config.h"
   6 #include "core/paint/FramePainter.h"
   7
   8 #include "core/editing/markers/DocumentMarkerController.h"
   9 #include "core/fetch/MemoryCache.h"
  10 #include "core/frame/FrameView.h"
  11 #include "core/inspector/InspectorInstrumentation.h"
  12 #include "core/inspector/InspectorTraceEvents.h"
  13 #include "core/layout/LayoutView.h"
  14 #include "core/page/Page.h"
  15 #include "core/paint/DeprecatedPaintLayer.h"
  16 #include "core/paint/DeprecatedPaintLayerPainter.h"
  17 #include "core/paint/LayoutObjectDrawingRecorder.h"
  18 #include "core/paint/PaintInfo.h"
  19 #include "core/paint/ScrollbarPainter.h"
  20 #include "core/paint/TransformRecorder.h"
  21 #include "platform/fonts/FontCache.h"
  22 #include "platform/graphics/GraphicsContext.h"
  23 #include "platform/graphics/paint/ClipRecorder.h"
  24 #include "platform/scroll/ScrollbarTheme.h"
  25
  26 namespace blink {
  27
  28 bool FramePainter::s_inPaintContents = false;
  29
  30 void FramePainter::paint(GraphicsContext* context, const GlobalPaintFlags globalPaintFlags, const IntRect& rect)
  31 {
  32     frameView().notifyPageThatContentAreaWillPaint();
  33
  34     IntRect documentDirtyRect = rect;
  35     IntRect visibleAreaWithoutScrollbars(frameView().location(), frameView().visibleContentRect().size());
  36     documentDirtyRect.intersect(visibleAreaWithoutScrollbars);
  37
  38     if (!documentDirtyRect.isEmpty()) {
  39         TransformRecorder transformRecorder(*context, *frameView().layoutView(),
  40             AffineTransform::translation(frameView().x() - frameView().scrollX(), frameView().y() - frameView().scrollY()));
  41
  42         ClipRecorder recorder(*context, *frameView().layoutView(), DisplayItem::ClipFrameToVisibleContentRect, LayoutRect(frameView().visibleContentRect()));
  43
  44         documentDirtyRect.moveBy(-frameView().location() + frameView().scrollPosition());
  45         paintContents(context, globalPaintFlags, documentDirtyRect);
  46     }
  47
  48     // Now paint the scrollbars.
  49     if (!frameView().scrollbarsSuppressed() && (frameView().horizontalScrollbar() || frameView().verticalScrollbar())) {
  50         IntRect scrollViewDirtyRect = rect;
  51         IntRect visibleAreaWithScrollbars(frameView().location(), frameView().visibleContentRect(IncludeScrollbars).size());
  52         scrollViewDirtyRect.intersect(visibleAreaWithScrollbars);
  53         scrollViewDirtyRect.moveBy(-frameView().location());
  54
  55         TransformRecorder transformRecorder(*context, *frameView().layoutView(),
  56             AffineTransform::translation(frameView().x(), frameView().y()));
  57
  58         ClipRecorder recorder(*context, *frameView().layoutView(), DisplayItem::ClipFrameScrollbars, LayoutRect(IntPoint(), visibleAreaWithScrollbars.size()));
  59
  60         paintScrollbars(context, scrollViewDirtyRect);
  61     }
  62 }
  63
  64 void FramePainter::paintContents(GraphicsContext* context, const GlobalPaintFlags globalPaintFlags, const IntRect& rect)
  65 {
  66     Document* document = frameView().frame().document();
  67
  68 #ifndef NDEBUG
  69     bool fillWithRed;
  70     if (document->printing())
  71         fillWithRed = false; // Printing, don't fill with red (can't remember why).
  72     else if (frameView().frame().owner())
  73         fillWithRed = false; // Subframe, don't fill with red.
  74     else if (frameView().isTransparent())
  75         fillWithRed = false; // Transparent, don't fill with red.
  76     else if (globalPaintFlags & GlobalPaintSelectionOnly)
  77         fillWithRed = false; // Selections are transparent, don't fill with red.
  78     else if (frameView().nodeToDraw())
  79         fillWithRed = false; // Element images are transparent, don't fill with red.
  80     else
  81         fillWithRed = true;
  82
  83     if (fillWithRed && !LayoutObjectDrawingRecorder::useCachedDrawingIfPossible(*context, *frameView().layoutView(), DisplayItem::DebugRedFill, LayoutPoint())) {
  84         IntRect contentRect(IntPoint(), frameView().contentsSize());
  85         LayoutObjectDrawingRecorder drawingRecorder(*context, *frameView().layoutView(), DisplayItem::DebugRedFill, contentRect, LayoutPoint());
  86     }
  87 #endif
  88
  89     LayoutView* layoutView = frameView().layoutView();
  90     if (!layoutView) {
  91         WTF_LOG_ERROR("called FramePainter::paint with nil layoutObject");
  92         return;
  93     }
  94
  95     RELEASE_ASSERT(!frameView().needsLayout());
  96     ASSERT(document->lifecycle().state() >= DocumentLifecycle::CompositingClean);
  97
  98     TRACE_EVENT1("devtools.timeline", "Paint", "data", InspectorPaintEvent::data(layoutView, LayoutRect(rect), 0));
  99
 100     bool isTopLevelPainter = !s_inPaintContents;
 101     s_inPaintContents = true;
 102
 103     FontCachePurgePreventer fontCachePurgePreventer;
 104
 105     // TODO(jchaffraix): GlobalPaintFlags should be const during a paint
 106     // phase. Thus we should set this flag upfront (crbug.com/510280).
 107     GlobalPaintFlags localPaintFlags = globalPaintFlags;
 108     if (document->printing())
 109         localPaintFlags |= GlobalPaintFlattenCompositingLayers | GlobalPaintPrinting;
 110
 111     ASSERT(!frameView().isPainting());
 112     frameView().setIsPainting(true);
 113
 114     // frameView().nodeToDraw() is used to draw only one element (and its descendants)
 115     LayoutObject* layoutObject = frameView().nodeToDraw() ? frameView().nodeToDraw()->layoutObject() : 0;
 116     DeprecatedPaintLayer* rootLayer = layoutView->layer();
 117
 118 #if ENABLE(ASSERT)
 119     layoutView->assertSubtreeIsLaidOut();
 120     LayoutObject::SetLayoutNeededForbiddenScope forbidSetNeedsLayout(*rootLayer->layoutObject());
 121 #endif
 122
 123     DeprecatedPaintLayerPainter layerPainter(*rootLayer);
 124
 125     float deviceScaleFactor = blink::deviceScaleFactor(rootLayer->layoutObject()->frame());
 126     context->setDeviceScaleFactor(deviceScaleFactor);
 127
 128     layerPainter.paint(context, LayoutRect(rect), localPaintFlags, layoutObject);
 129
 130     if (rootLayer->containsDirtyOverlayScrollbars())
 131         layerPainter.paintOverlayScrollbars(context, LayoutRect(rect), localPaintFlags, layoutObject);
 132
 133     frameView().setIsPainting(false);
 134
 135     frameView().setLastPaintTime(currentTime());
 136
 137     // Regions may have changed as a result of the visibility/z-index of element changing.
 138     if (document->annotatedRegionsDirty())
 139         frameView().updateAnnotatedRegions();
 140
 141     if (isTopLevelPainter) {
 142         // Everything that happens after paintContents completions is considered
 143         // to be part of the next frame.
 144         memoryCache()->updateFramePaintTimestamp();
 145         s_inPaintContents = false;
 146     }
 147
 148     InspectorInstrumentation::didPaint(layoutView, 0, context, LayoutRect(rect));
 149 }
 150
 151 void FramePainter::paintScrollbars(GraphicsContext* context, const IntRect& rect)
 152 {
 153     if (frameView().horizontalScrollbar() && !frameView().layerForHorizontalScrollbar())
 154         paintScrollbar(context, frameView().horizontalScrollbar(), rect);
 155     if (frameView().verticalScrollbar() && !frameView().layerForVerticalScrollbar())
 156         paintScrollbar(context, frameView().verticalScrollbar(), rect);
 157
 158     if (frameView().layerForScrollCorner())
 159         return;
 160
 161     paintScrollCorner(context, frameView().scrollCornerRect());
 162 }
 163
 164 void FramePainter::paintScrollCorner(GraphicsContext* context, const IntRect& cornerRect)
 165 {
 166     if (frameView().scrollCorner()) {
 167         bool needsBackground = frameView().frame().isMainFrame();
 168         if (needsBackground && !LayoutObjectDrawingRecorder::useCachedDrawingIfPossible(*context, *frameView().layoutView(), DisplayItem::ScrollbarCorner, LayoutPoint())) {
 169             LayoutObjectDrawingRecorder drawingRecorder(*context, *frameView().layoutView(), DisplayItem::ScrollbarCorner, FloatRect(cornerRect), LayoutPoint());
 170             context->fillRect(cornerRect, frameView().baseBackgroundColor());
 171
 172         }
 173         ScrollbarPainter::paintIntoRect(frameView().scrollCorner(), context, cornerRect.location(), LayoutRect(cornerRect));
 174         return;
 175     }
 176
 177     ScrollbarTheme::theme()->paintScrollCorner(context, *frameView().layoutView(), cornerRect);
 178 }
 179
 180 void FramePainter::paintScrollbar(GraphicsContext* context, Scrollbar* bar, const IntRect& rect)
 181 {
 182     bool needsBackground = bar->isCustomScrollbar() && frameView().frame().isMainFrame();
 183     if (needsBackground) {
 184         IntRect toFill = bar->frameRect();
 185         toFill.intersect(rect);
 186         context->fillRect(toFill, frameView().baseBackgroundColor());
 187     }
 188
 189     bar->paint(context, rect);
 190 }
 191
 192 FrameView& FramePainter::frameView()
 193 {
 194     return *m_frameView;
 195 }
 196
 197 } // namespace blink